Because they are complimentary in FC, they aren't recorded - just handed out. You would think, because of the small number of them up there, they'd be easier to keep track of but it often times doesn't turn out that way.

Most times when Ive heard them say there is one missing it is indeed in F and completely unintentional in nature. Im guilty of this . They offered the player I took it in case I wanted it later. sat in my seat along the armrest, ate, fell asleep, woke up for descent as they prepped the cabin for landing. All the sudden the F FA said um guys we are still missing a player up here. Then I thought oh must be me